The Complete Guide to Solar Health Checks

How much does a solar health check cost?

A professional solar health check typically costs between $200 and $350. Be highly suspicious of "free" health checks, as these are almost always lead-generation tactics designed to sell you a new system, rather than an impartial assessment of your current one.

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Millions of Australian homes have solar panels on the roof. The vast majority of those homeowners assume that because the little green light on the inverter is on, everything is working perfectly.

This is a very expensive assumption.

Solar systems degrade. Inverters fail. Isolators burn out. And because the degradation is slow, most people do not notice they are losing money until they get a massive quarterly electricity bill. This is why the solar health check has become a critical part of owning a system. But the industry is currently flooded with bad actors using the term "health check" as a Trojan horse for sales.

Here is what a real solar health check looks like, and how to avoid the scams.

What is a real solar health check?

A genuine health check is a diagnostic service. It is performed by a licensed, Clean Energy Council (CEC) accredited electrician. It takes at least an hour.

It must include these five components:

1. Inverter Diagnostic: Checking error logs, verifying firmware updates, and ensuring the grid voltage settings match current local requirements.
2. DC Isolator Inspection: This is the most critical safety check. DC isolators are the leading cause of solar-related roof fires in Australia. They must be checked for water ingress, UV degradation, and secure connections.
3. Cable and Conduit Check: Ensuring all wiring is secure, not rubbing against sharp roof edges, and that conduit hasn't cracked under the Australian sun.
4. Panel Physical Inspection: Looking for micro-cracks, snail trails (dark lines on the cells), and severe soiling that rain cannot wash away.
5. Performance Verification: Comparing the system's current output against what it should theoretically be producing based on its age, size, and the day's weather conditions.

The "Free Health Check" Scam

If a company offers you a free health check, they are not sending an electrician. They are sending a salesperson.

They will likely look at your roof from the street, maybe glance at your inverter, and then sit at your kitchen table to explain why your five-year-old system is "obsolete" and needs to be replaced immediately.

You should pay for a health check. Paying for the service guarantees independence. You are paying for their time and their diagnostic expertise, not for a sales pitch.

When should you get one?

The Australian Government recommends a professional inspection every two years. However, there are three specific triggers that should prompt an immediate booking:

• The Bill Shock: Your electricity bill is suddenly 30% higher than the same time last year, despite no major changes in your household consumption.
• The Red Light: Your inverter is displaying a red fault light or an error code on the screen.
• The Restart Loop: You notice your inverter constantly clicking, shutting down, and restarting during the middle of a sunny day. This usually indicates a grid voltage issue that needs professional adjustment.

How to choose a provider

Look for a company that explicitly states they service systems they did not install. Look for clear, upfront pricing. And most importantly, ask if they provide a written diagnostic report upon completion.

A good technician will leave you with a document detailing exactly what is working, what is degrading, and what needs immediate attention. A bad technician will leave you with a quote for a completely new system.

Protect your investment. Get it checked properly.